.option-first {
  background-color: #F4F4F4;
}
.option-first .container .row h2 {
  font-size: 1.6rem;
  line-height: 2;
  margin-top: 9rem;
  margin-bottom: 3.8rem;
}
.option-first .container .row h2 > span {
  color: #25BC89;
  padding-bottom: .7rem;
  border-bottom: 2px solid #25BC89;
}
.option-first .container .row h2 + p {
  line-height: 1.6;
  margin-bottom: 3rem;
}
.option-first .container .row h2 + p > span {
  color: #25BC89;
}
.option-first .container .row .option-first-img {
  padding-top: 4rem;
  padding-right: 3rem;
}
.option-first .container .row .option-first-img > picture {
  float: right;
}
@media screen and (max-width: 640px) {
  .option-first .container .row h2 {
    margin-top: 2rem;
    margin-bottom: 2rem;
  }
}
.option-second {
  text-align: center;
}
.option-second .container-fluid {
  padding: 0;
}
.option-second .container-fluid h2 {
  font-size: 1.6rem;
  margin-top: 5.7rem;
  margin-bottom: 1.6rem;
}
.option-second .container-fluid .pcImg {
  width: 100%;
  height: 917px;
  display: block;
  background-position: center center;
  /*设置背景图片的大小*/
  background-size: cover;
}
.option-second .container-fluid .mobileImg {
  width: 100%;
  display: block;
}
.option-second .container-fluid .mobileImg > img {
  width: 100%;
  display: block;
}
.option-second .container-fluid .carousel-indicators li {
  width: 1.8rem;
  height: .4rem;
  margin: 0;
  background-color: #25BC89;
  border-radius: .2rem;
  opacity: .5;
}
.option-second .container-fluid .carousel-indicators li.active {
  width: 1.8rem;
  height: .4rem;
  opacity: 1;
}
.option-second .container-fluid .carousel-control.left,
.option-second .container-fluid .carousel-control.right {
  background-image: none;
  color: #25BC89;
}
.option-third {
  width: 100%;
  overflow: hidden;
  background: url("../../images/about_us/option3_bg1920.jpg") no-repeat center;
  color: #fff;
}
.option-third .container .row h2 {
  margin-top: 11rem;
  font-size: 1.8rem;
  position: relative;
  right: 100%;
}
.option-third .container .row h3 {
  padding-bottom: .7rem;
  font-size: 1.5rem;
  position: relative;
  right: 100%;
}
.option-third .container .row h3 + span {
  width: 4rem;
  height: .3rem;
  display: inline-block;
  background-color: #25BC89;
  margin-bottom: 3.6rem;
}
.option-third .container .row p {
  line-height: 1.7;
  padding-bottom: 7rem;
  position: relative;
  right: 100%;
}
.option-third .container .row .option-third-img {
  padding: 7.2rem 0;
  float: right;
}
.option-third .container .row .option-third-img picture {
  position: relative;
  left: 100%;
}
@media screen and (max-width: 640px) {
  .option-third .container .row h2 {
    margin-top: 3rem;
  }
}
.option-fourth {
  width: 100%;
  position: relative;
}
.option-fourth .option-fourth-title {
  width: 15rem;
  height: 15rem;
  background-image: url("../../images/about_us/about_us_circular.png");
  background-size: 15rem 15rem;
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, -50%);
}
.option-fourth .option-fourth-title > h2 {
  display: none;
}
.option-fourth .container .row .option-fourth-img {
  padding-top: 14rem;
}
.option-fourth .container .row .option-fourth-img > picture {
  position: relative;
  right: 100%;
}
.option-fourth .container .row .option-fourth-text {
  padding-top: 18rem;
  padding-bottom: 4rem;
}
.option-fourth .container .row .option-fourth-text .option-fourth-line {
  width: 4rem;
  height: .3rem;
  display: inline-block;
  background-color: #25BC89;
  margin-bottom: 3.6rem;
}
.option-fourth .container .row .option-fourth-text .option-fourth-text-p {
  line-height: 1.6;
}
@media screen and (max-width: 640px) {
  .option-fourth .container .row .option-fourth-text {
    padding-top: 8rem;
  }
}
